I just wanted to drop you all a quick note that I finally found a solution for generating hexahedra meshes out of STL surfaces (with an intermediate tetrahedral mesh step). Unfortunately, this solution is not GMSH but an external program :(. As a further drawback this tool is not even OpenSource... Fortunately, the academic license of it is quite affordable. So everybody who runs into the same problems I did should take a look at CUBIT (from Sandia National Labs). I hope it's ok that I point towards this external solution - please excuse any inconvenience caused.
Cheers, Uwe --- 2010/11/23 Meiner Auchmeiner <[email protected]>: > Hello again, > > thank you very much for your quick reply. > > 2010/11/23 Jean-Francois Remacle <[email protected]>: >> >> Le 23-nov.-10 à 17:25, Meiner Auchmeiner a écrit : >> >> Hi gmsh group, >> >> >> Hello, >> >> I was wondering if anybody here succeeded to mesh a STL geometry with >> an unstructured mesh consisting of hexahedra elements. I'm trying to >> mesh following file(s) using standard settings, except for the >> subdivision algorithm "All hexas": 500.stl & 500.geo (see attachment). >> I'm always getting the error messages "Error: Cannot evaluate point on >> discrete face" and "Error: Cannot compute parametric coordinates on >> discrete face". Whereas meshing the STL geometry with tetrahedron >> elements work like a charm. Is there any intermediate step necessary >> to optimize (maybe with e.g. MeshLab) the input STL geometry? Or is >> there any gmsh preprocessing option/conversion I overlooked ? >> >> >> There is actually NO automatic hexaedral mesher in GMSH. >> For doing a better STL, you can use the reparametrization tools, see >> https://geuz.org/trac/gmsh/wiki/STLRemeshing (username wiki, password wiki). >> JF > > Hmm, so do I get you right, there is no way (yet?) of generating > hexahedral meshes out of STL files in gmsh? In all my naivety I > thought it would be possible in GMSH to subdivide tetrahedra elements > in hexahedra elements... Say, what about the manual hexahedral mesher > in GMSH you just mentioned, is it - with the right manually input - > capable of meshing closed STL surface geometries with hexas? > > Uwe > > > >> Thanks >> Uwe >> >> P.S.: The skeleton data have been obtained by courtesy of S. Van Sint >> Jan, Laboratory of Anatomy, Biomechanics and Organogenesis, Université >> Libre de Bruxelles. >> <500.stl><500.geo>_______________________________________________ >> gmsh mailing list >> [email protected] >> http://www.geuz.org/mailman/listinfo/gmsh >> >> ------------------------------------------------------------------ >> Prof. Jean-Francois Remacle >> Universite catholique de Louvain (UCL) >> Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering >> Institute of Mechanics, Materials and Civil Engineering (iMMC) >> Center for Systems Engineering and Applied Mechanics (CESAME) >> Tel : +32-10-472352 -- Mobile : +32-473-909930 >> >> >> >> >> >> > _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
